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Head injury - Overview

Alternative Names

Brain injury; Head trauma; Contusion

Definition of Head injury:

A head injury is any trauma that leads to injury of the scalp, skull, or brain. The injuries can range from a minor bump on the skull to serious brain injury.

Head injury is classified as either closed or open (penetrating).

  • A closed head injury means you received a hard blow to the head from striking an object, but the object did not break the skull.
  • An open, or penetrating, head injury means you were hit with an object that broke the skull and entered the brain. This usually happens when you move at high speed, such as going through the windshield during a car accident. It can also happen from a gunshot to the head.

There are several types of brain injuries, including:

  • Concussion, the most common type of traumatic brain injury, in which the brain is shaken
  • Contusion, which is a bruise on the brain

See also:

Considerations:

Every year, millions of people have a head injury. Most of these injuries are minor because the skull provides the brain with considerable protection. The symptoms of minor head injuries usually go away on their own. More than half a million head injuries a year, however, are severe enough to require hospitalization.

Learning to recognize a serious head injury, and implementing basic first aid, can make the difference in saving someone's life.

In patients who have suffered a severe head injury, there are often other organ systems injured. For example, a head injury is sometimes accompanied by a spinal injury.

Causes:

Common causes of head injury include traffic accidents, falls, physical assault, and accidents at home, work, outdoors, or while playing sports.

Some head injuries result in prolonged or non-reversible brain damage. This can occur as a result of bleeding inside the brain or forces that damage the brain directly. These more serious head injuries may cause:

  • Coma
  • Chronic headaches
  • Loss of or change in sensation, hearing, vision, taste, or smell
  • Paralysis
  • Seizures
  • Speech and language problems
  • Reviewed last on: 1/7/2009
  • Jacob L. Heller, MD, Emergency Medicine, Virginia Mason Medical Center, Seattle, Washington, Clinic. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

References

Heegaard WG, Biros MH. Head. In: Marx J. Rosen’s Emergency Medicine: Concepts and Clinical Practice. 6th ed. St. Louis, Mo: Mosby; 2006: chap. 38.

Atabaki SM. Pediatric head injury. Pediatr Rev. 2007 Jun;28(6):215-24.

The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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